The Genie 77303GT is a genuine OEM Counterbalance Valve, 3500 PSI, ATM VEN designed for Genie S-series telescopic boom lifts and Z-series articulating boom lifts. This valve is a direct OEM replacement sourced from Genie and built to the exact specifications required for correct operation on the machines listed. Fitment covers a wide range of models including the S-40, S-45, S-60, S-65, S-80, S-85, and their XC, TRAX, HC, and J variants, as well as Z-45/25, Z-45/25J, Z-51/30J, Z-62/40, and the TZ-34/20 — confirm part number 77303GT against your machine's parts manual before ordering.
Key Features
- Genuine OEM Quality — Sourced directly from Genie, this valve meets the exact pressure rating and porting spec required for the circuit it serves — no guesswork on compatibility.
- Rated at 3500 PSI — The 3500 PSI rating matches the design pressure of the valve circuit on the listed boom lifts, ensuring the valve opens and holds at the correct threshold.
- Direct OEM Replacement — Replaces the original valve on S-series telescopic and Z-series articulating booms with no modification to porting or mounting required.
- Broad Fitment Across Genie Boom Families — Covers a wide range of S-series and Z-series models, including XC, TRAX, HC, J, IC, DC, and Bi-Energy variants.
- Operational Safety — A counterbalance valve is a load-holding and load-control component on aerial boom lifts. Using a correctly rated OEM valve supports safe, controlled boom movement as designed.
A counterbalance valve is a hydraulic control valve that holds a suspended load in position and controls its lowering speed, preventing uncontrolled movement if a line loses pressure. On boom lifts, this type of valve is typically installed on the cylinders that raise and extend the boom, where it acts as a safety check — holding the boom in place under load and metering fluid out at a controlled rate when the operator lowers the boom. A worn or failed counterbalance valve can cause the boom to drift, drop unexpectedly, or respond erratically to operator inputs, making prompt replacement with the correct OEM part essential for safe and predictable machine operation.
Part Details
| Part Number | 77303GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Counterbalance Valve, 3500 PSI, ATM VEN |
Compatibility & Fitment
| Name | Models |
|---|---|
| S-40 | S-40 |
| S-45 | S-45 |
| S-45 XC | S-45 XC |
| S-60 | S-60 |
| S-60 HC | S-60 HC |
| S-60 J | S-60 J |
| S-60 TRAX | S-60 TRAX |
| S-60 XC | S-60 XC |
| S-60X | S-60X |
| S-65 | S-65 |
| S-65 TRAX | S-65 TRAX |
| S-65 XC | S-65 XC |
| S-80 | S-80 |
| S-80 J | S-80 J |
| S-80 XC | S-80 XC |
| S-80X | S-80X |
| S-85 | S-85 |
| S-85 XC | S-85 XC |
| TZ-34/20 | TZ-34/20 |
| Z-45 XC | Z-45 XC |
| Z-45/25 | Z-45/25 |
| Z-45/25 IC | Z-45/25 IC |
| Z-45/25J Bi-Energy | Z-45/25J Bi-Energy |
| Z-45/25J DC | Z-45/25J DC |
| Z-45/25J IC | Z-45/25J IC |
| Z-45/25J IC Power | Z-45/25J IC Power |
| Z-51/30J | Z-51/30J |
| Z-62/40 | Z-62/40 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
